GRE Discussion forum - GRE Verbal, GRE Quant, GRE AWA - TOPGRE.COM

GRE Classes, doubts, practice questions
It is currently Sun Feb 05, 2012 7:43 am

View unanswered posts | View active topics


Board index » GRE Math » GRE Math Doubts, Quant Questions Discussions

All times are UTC + 5:30 hours




Post new topic Reply to topic  Page 1 of 1
  [ 3 posts ] 
  Previous topic | Next topic 
Author Message
topgre
 Post subject: GRE Problem solving : Averages - Arithmetic Mean
PostPosted: Sat Jul 25, 2009 11:01 am 
Offline
Site Admin
User avatar

Joined: Tue May 23, 2006 8:41 pm
Posts: 19
The average (arithmetic mean) of x and y is 30. If z = 10, then what is the average of x, y, and z?
A. 13 1/3
B. 21 1/4
C. 23 1/3
D. 21 1/3
E. 22 1/4

_________________
Topgre - GRE Classes @ Chennai.
Next NEW Format Weekend Batches start @ Velachery, Chennai on Feb 4, 2012

Top
 Profile E-mail  
 
urpalvenki
 Post subject: Re: GRE Problem solving : Averages - Arithmetic Mean
PostPosted: Thu Jul 30, 2009 12:12 am 
Offline
Learning the ABCs

Joined: Sat Jul 18, 2009 10:24 am
Posts: 2
The answer is C. 23 1/3

The sum of x and y comes to 60 from the mean...
Adding z the total becomes 70 and on dividing by 3 we get the answer...
Top
 Profile E-mail  
 
target1500
 Post subject: Re: GRE Problem solving : Averages - Arithmetic Mean
PostPosted: Thu Aug 06, 2009 7:37 pm 
Offline
Learning the ABCs

Joined: Thu Aug 06, 2009 7:34 pm
Posts: 1
(x + y)/2 = 30
So, x + y = 60
z =10. So, x + y + z = 60 + 10 = 70

Averages of x, y, z = (x + y+ z)/3 = 70/3

Answer C. 231/3
Top
 Profile E-mail  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  Page 1 of 1
  [ 3 posts ] 

Board index » GRE Math » GRE Math Doubts, Quant Questions Discussions

All times are UTC + 5:30 hours


Who is online

Users browsing this forum: No registered users and 0 guests

You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  
cron
Powered by phpBB © 2000, 2002, 2005, 2007 phpBB Group

phpBB SEO